Cost / License
- Free
- Open Source
Platforms
- Linux
John the Ripper is described as 'Fast password cracker, currently available for many flavors of Unix, Windows, DOS, BeOS, and OpenVMS. Its primary purpose is to detect weak Unix passwords. Besides several crypt(3) password hash types most commonly found on various Unix systems, supported' and is an app in the security & privacy category. There are more than 10 alternatives to John the Ripper for Windows, Linux, Mac and BSD. The best John the Ripper alternative is Kon-Boot. It's not free, so if you're looking for a free alternative, you could try ophcrack or hashcat. Other great apps like John the Ripper are Offline NT Password & Registry Editor, Trinity Rescue Kit, L0phtCrack and BarsWF.
MDCrack is a free featureful password cracker designed to bruteforce several commonly used hash algorithms at a very aggressive speed rate.
A CUDA & OpenCL accelerated rainbow table implementation from the ground up, and a CUDA hash brute forcing tool with support for many hash types including MD5, SHA1, LM, NTLM, and lots more!